LIFE HISTORIES OF LEAFHOPPERS OF MAINE. 



65 



rows of four to six in a row but also very commonly as scattered 

 single eggs. The arrangement on leaf sheath and blade are 

 shown in the figure and for the cases observed there was about 

 an equal distribution between leaf sheath and blade. The egg^ 

 do not pass entirely through the leaf but lie between the epi- 

 dermal layers so that if the leaf sheath is stripped off the egg^ 

 come with it even in very thin parts. A little blister shows on 

 the outside and the eyes appear as minute red dots. The eggs 

 are set obliquely to the vascular bundles and minute reticulations 

 of the inner epidermis may be seen covering the egg if exam- 

 ined with a lens. On the blade they are thrust through from 

 the upper surface but lie closer to the under epidermis. Thirty- 

 seven eggs were counted within the length of an inch on one 

 stem of oat. 



Fig. 1. Cicadula sexnotata. Eggs, a, Oat stem and blade showing 

 points of egg deposition x and feeding punctures y ; b, eggs as seen in 

 plant tissue; c, egg dissected from female, surface view; d, egg dis- 

 sected from female, sectional view; e, freshly laid from oat stem; /, 

 eye spot appearing; g, eye distinct egg in network of plant cells; h, 

 embryo with segments developed; (Original). 



On emergence from the egg the nymph is light yellow with 

 red eyes but they soon become tinged with dusky and will he 

 noticed as minute blackish specks on the leaf surface. The 



